Lesson 7 Problem Set

 Define the constant of proportionality: 
Bananas are $0.59 per pound.

• $0.59
• $1.29
• $2.99
• $5.90

Bananas are $0.59 per pound
How much will 25 pounds of bananas cost? .

• $15.00
• $14.75
• $14.00
• $12.99

The dry cleaning fee for 3 pairs of pants is $18.  What is the constant of proportionality?

• $54
• $6
• $21
• $15

The dry cleaning fee for 3 pairs of pants is $18.  How much will the dry cleaner charge for 11 pairs of pants?

• $66
• 11/$6
• $6/11
• $54

For every $5 that Micah saves, his parents give him $10.  What is the constant of proportionality?

• $2
• $50
• $5
• 1/2

For every $5 that Micah saves, his parents give him $10.  If Micah saves $150, how much money will his parents give him?

• $250
• $25
• $300
• $275

Each school year, the seventh graders who study Life Science participate in a special field trip to the city zoo. In 2010, the school paid $1,260 for 84 students to enter the zoo. In 2011, $1,050 for 70 students.  In 2012, $1,395 for 93 students. Is the price the school pays each year proportional to the number of students entering the zoo?

• Yes constant is 12
• Yes constant is 15
• No there is no constant
• Yes constant is 10

Each school year, the seventh graders who study Life Science participate in a special field trip to the city zoo. In 2010, the school paid $1,260 for 84 students to enter the zoo. In 2011, $1,050 for 70 students.  In 2012, $1,395 for 93 students. What would the school pay if 120 students entered the zoo?What would the school pay if 120 students entered the zoo?  

• $1,200
• $1,800
• $2,000
• $3.500

Each school year, the seventh graders who study Life Science participate in a special field trip to the city zoo. In 2010, the school paid $1,260 for 84 students to enter the zoo. In 2011, $1,050 for 70 students.  In 2012, $1,395 for 93 students. What would the school pay if 120 students entered the zoo? How many students would enter the zoo if the school paid $1,425?

• 100
• 95
• 80
• 105

What is a variable? 

• a ratio expressed as a quantity of 1
• a symbol (such as a letter) that is a placeholder for a number
• the number that describes the multiplicative relationship between measures
•  a line that passes through the origin